Group lessons with 14 young children and one instructor. Rubbish teaching and completely unsafe especially during incredibly busy half term week. It's a miracle no kids got lost. Expensive too.
Also, in Morzine, ESF started lessons at bottom of Plenney, which meant that they had to get gondola to top of Plenney before lesson could start. Because it was so busy it took half an hour each morning and lessons were only two hours anyway. All other ski companies start lessons at top of Plenney.
Do yourself a favour - don't use ESF. I should have known better as their reputation precedes them.